›› 2015, Vol. 28 ›› Issue (8): 160-.

• 论文 • 上一篇    下一篇

基于导波模态对称曲线的管道近焊区缺陷识别

张伟,姜银方,严有琪,雷玉兰,刘秋阁,陈志伟,杜斌   

  1. (1.江苏大学 机械工程学院,江苏 镇江 212013;
    2.江苏省特种设备安全监督检验研究院 镇江分院,江苏 镇江 212009)
  • 出版日期:2015-08-15 发布日期:2015-08-15
  • 作者简介:张伟(1989—),女,硕士研究生。研究方向:管道导波检测及信号分析。E-mail:18361810071@163.com
  • 基金资助:

    江苏省特检院2012年度科技基金资助项目(KJ(Y)2012049)

Recognition of Defects Nearby Pipeline Welding Based on the Guided Wave Mode Symmetry Curve

ZHANG Wei,JIANG Yinfang,YAN Youqi,LEI Yulan,LIU Qiuge,CHEN Zhiwei,DU Bin   

  1. (1.Institute of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China;
    2.Zhenjiang Branch,Jiangsu Province Special Equipment Safety Supervision Inspection Institute,Zhenjiang 212009,China)
  • Online:2015-08-15 Published:2015-08-15

摘要:

研究了模态对称曲线辅助识别管道近焊区缺陷的可行性。通过建立导波检测系统,基于导波模态对称检测理论,设计模态对称算法并绘制模态对称曲线,用于管道近焊区缺陷的识别,采集管道近焊区缺陷试验信号进行分析。结果表明,管道近焊区导波模态对称曲线幅值在缺陷处升高,且随着缺陷的截面积比的加大而增高。通过对回波信号进行小波包能量谱分析,发现回波信号的能量在缺陷处聚焦,验证了用模态对称曲线辅助识别管道近焊区缺陷的有效性。

关键词: 导波检测, 模态对称曲线, 小波能量谱, 识别

Abstract:

The feasibility of using modal symmetry curve for damage identification nearby pipe circumferential welds is discussed.Based on the theory of guided wave mode symmetry detection,the symmetry curve is drawn and the symmetric algorithm for damage identification is formulated.Analysis of the experimental signal of pipeline nearby welding defects shows that the magnitude of symmetry curve rises at the defect sites.And the signal analysis of wavelet packet energy spectrum reveals that the energy of the echo signal focuses on the defects,which verifies the effectiveness of modal symmetrical curve in the auxiliary identification of the pipe circumferential weld defects.

Key words: waveguide detection;modal symmetry curve;wavelet packet energy spectrum;identification

中图分类号: 

  • TE973.6